Juan Martin del Potro had to go the distance to upset No. 3 seed Andy Murray 6-7 (5), 6-3, 6-1 for the first time in five tries on hard courts and will play Djokovic in Saturday’s semifinals. The Argentine has lost to Djokovic eight times in 10 meetings.

No. 8 Caroline Wozniacki outlasted fourth-seeded Angelique Kerber 2-6, 6-4, 7-5 in a 2½-hour semifinal that included 14 service breaks, including seven in the final set. Wozniacki, who won here in 2011, will play 2006 champion Maria Sharapova, a 6-4, 6-3 winner over No. 13 Maria Kirilenko, in Sunday’s final.

Sharapova (27) and Wozniacki (20) are third and fourth among active players for most titles won, trailing only Serena (47) and Venus Williams (44).

Djokovic extended his winning streak to 22 matches dating to Oct. 31, when he last lost to American Sam Querrey in Paris. The Serb is 17-0 this year, including two titles.

“When it was important, I didn’t allow him to come back to the match. I didn’t allow him to have an opportunity to believe that he can maybe have a break back and get back into the match,” Djokovic said about Tsonga. “That was very important for me to stay mentally committed throughout the whole match.”

Djokovic broke Tsonga four times and served out the match with his fourth 40-love game in the second set.

Against Del Potro, Murray double-faulted for the eighth time to end the 2½-hour match, missing with his second serve down the middle to get broken for the third time in the set and fifth in the match. He was playing his first tournament since losing the Australian Open final to Djokovic in late January.

In the first women’s semifinal, Wozniacki and Kerber resembled junior players at times as they exchanged countless moonballs. Kerber pulled a moonball wide to set up match point and then netted a forehand to end it, stopping her three-match winning streak against Wozniacki.

Sharapova earned the only two service breaks of the second set, winning the match with a forehand down the line. She hasn’t lost a set in five matches so far.

By reaching the final, Sharapova will move from No. 3 in the world to No. 2, overtaking Victoria Azarenka when the WTA Tour rankings come out Monday.

Kirilenko is projected to rise to No. 13 — one spot from her career-high of 12th — after losing the biggest semifinal of her career.

A long-awaited plan to keep the Raiders in Oakland was unveiled late Friday by city and Alameda County officials. In a news release issued late Friday afternoon, local officials touted the plan for a new $1.3 billion stadium and mixed-use development designed to keep the team at the Coliseum site. Raiders owner Mark Davis currently is pursuing a plan to...